Fully cooked. Skinless bratwurst with beer. BHA, BHT and citric acid added to help protect flavor. A classic brat with the distinct flavor of Guinness Beer. Made by Rose est. 1924. US inspected and passed by Department of Agriculture. This is the first American bratwurst to feature the world's number one stout! Guinness Beer Brats marry the mouthwatering succulence of the classic brat with the distinct flavor of Guinness, a beer that has been enjoyed by consumers around the world for nearly 250 years. rosepacking.com. 100% recycled content.